Mystery!
Rounding
Addition
Subtraction
Conversions
100

48,675 __ 48,657

48,675 > 48,657 

100

Round 121,382 to the nearest hundred thousand.

100,000

100

12,426 + 23,462 =

35,888

100

86,754 - 32,421

54,333

100

2 L = ___ mL

2,000 mL

200

Write four hundred seventeen thousand, eight hundred seven in standard form and expanded form.

Standard form: 417,807

Expanded form: 400,000 + 10,000 + 7,000 + 800 + 7

200

Round 873,722 to the nearest ten thousand AND hundred thousand

Ten thousand: 870,000

Hundred thousand: 900,000

200

32,145 + 24,763 =

56,908

200

75,643 - 24,518 = 

51,125

200

5 km 316 m = ___ g

5,316 m

300

Read, Draw, Write

Ms. Lubin read 8 pages of a book. 

Mr. Doolittle read 2 times as many pages as Ms. Lubin.

Mrs. Mones read 6 pages less than Mr. Doolittle.

How many pages did Mrs. Mones read?

Mrs. Mones read 10 pages.

300

Round 539,012 to the nearest hundred thousand, ten thousand, AND thousand

Hundred thousand: 500,000

Ten thousand: 540,000

Thousand: 539,000

300

41,276 + 28,513 =

69,789

300

84,562 - 37,241 = 

47,321

300

3 m 26 cm = ___ cm

326 cm

400

Read, Draw, Write

The Tioga Hills library had 12,485 books. It bought 2,768 new books and then donated 1,395 books to another school. How many books does the library have now?

The Tioga Hills library has 13,858 books now.

400

Round 345,097 to the nearest hundred thousand, ten thousand, thousand, AND hundred

Hundred thousand: 300,000

Ten thousand: 350,000

Thousand: 345,000

Hundred: 345,100


400

267,586 + 354,765

622,351

400

563,742 - 278,521 =

285,221

400

3 kg 21 g + 5 kg 903 g =

8 kg 924 g OR 8,924 g

500

Read, Draw, Write

A toy store sold a total of 346,982 toys. They sold 122,900 squishies, 98,173 stuffed animals, and 107,331 fidgets. How many other toys did they sell?

The toy store sold 18,578 other toys.

500

Round 429,120 to the nearest hundred thousand, ten thousand, thousand, hundred, AND ten

Hundred thousand: 400,000

Ten thousand: 430,000

Thousand: 429,000

Hundred: 429,100

Ten: 429,120

500

378,697 + 246,875 =

625,572

500

500,000 - 268,473 = 

231,527

500

9 L 2 mL - 3 L 827 mL =

5 L 175 mL OR 5,175 mL